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      氣候變化研究進(jìn)展 ?? 2007, Vol. 03 ?? Issue (06): 345-349.

      ? 研究短論 ? 上一篇    下一篇

      1957-2004年影響我國的強熱帶氣旋頻數和強度變化

      王小玲 任福民   

      1. 國家氣候中心氣候系統診斷預測室 國家氣候中心
      • 收稿日期:2007-04-28 修回日期:2007-08-15 出版日期:2007-11-30 發(fā)布日期:2007-11-30
      • 通訊作者: 王小玲

      Variations in Frequency and Intensity of Strong Tropical Cyclones Affecting China During 1957-2004

        

      • Received:2007-04-28 Revised:2007-08-15 Online:2007-11-30 Published:2007-11-30

      摘要: :以中國氣象局西北太平洋熱帶氣旋資料為基礎,分析1957-2004年影響我國并達到臺風(fēng)強度以上的三類(lèi)熱帶氣旋,即生成熱帶氣旋、影響熱帶氣旋和登陸熱帶氣旋的頻數和強度的變化。結果表明:強熱帶氣旋頻數在1957-2004年間呈顯著(zhù)減少趨勢,強度越強,其減少趨勢越明顯。近50 a臺風(fēng)以上強度的強熱帶氣旋頻次占總頻次的比例沒(méi)有明顯的增加或減少趨勢,強臺風(fēng)和超強臺風(fēng)比例呈減少趨勢。1957-2004年熱帶氣旋的最大強度呈線(xiàn)性減弱趨勢,生成熱帶氣旋和影響熱帶氣旋的平均強度亦呈減弱趨勢,登陸臺風(fēng)的平均強度也呈減弱趨勢。

      關(guān)鍵詞: 強熱帶氣旋, 影響熱帶氣旋, 登陸熱帶氣旋, 中國

      Abstract: Based on the tropical cyclone track dataset in the Northwestern Pacific from China Meteorological Administration, variations in frequencies and intensities of tropical cyclones (TCs) in the western North Pacific, affecting-China tropical cyclones (ACTCs) and landfall ones (LTCs) reaching typhoon intensity during 1957-2004 were studied. Frequencies of strong tropical cyclones showed significant decreasing trends from 1957 to 2004 and the linear trend was much larger when the intensity was strong. There were no increasing or decreasing trends in the ratios of strong tropical cyclones reaching typhoon intensity, while those reaching strong typhoon and super typhoon showed decreasing trends during 1957-2004. The maximum intensities of TCs, ACTCs and LTCs had all decreased during the period of 1957-2004. The mean intensities of TCs and ACTCs illustrated decreasing trends and the mean intensity of LTCs achieving typhoon intensity also showed decreasing trends.

      Key words: strong tropical cyclone, affecting China tropical cyclone, landfall tropical cyclone, China

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